| Media type | Read-only optical disc |
|---|---|
| Encoding | Pulse-width modulation (analog) |
| Capacity | 324 megabytes of digital information, or 54,000 frames of PWM-encoded analog video (per side) |
| Read mechanism | Laser diode |
| Developed by | Philips |
| Dimensions | 30 cm (11.81 in) |
| Usage | Interactive media |
| Extended from | Laserdisc |
| Extended to | LD-ROM |
| Optical discs |
|---|
 |
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LV-ROM is an optical disc format developed by Philips Electronics to integrate analog video and computer software for interactive multimedia. The LV-ROM is a specialized variation of the CAV Laserdisc. LV-ROM is an initialism for "LaserVision Read-Only Memory".
Like Laserdisc, LV-ROM discs store analog audio and video by encoding it in pulse-width modulation. However, LV-ROM also stores computer files via the Advanced Disc Filing System, which is the file system used by Acorn Computers. An LV-ROM disc can store up to 324 megabytes of digital information, or up to 54,000 frames of analog video[1] (36 minutes with a frame rate of 25 fps) per side.
The format had only one application: to publish documentary video, children's writings, and other historical records compiled from 1984 to 1986 for the BBC Domesday Project.[disputed – discuss] The Domesday Project LV-ROM discs were played using a BBC Master computer connected via SCSI-1[2] to a Philips AIV VP415 Laserdisc player.[1] A genlock enabled the software stored on the LV-ROM to display computer graphics over the analog video on the BBC Master's computer screen. The buttons and menus of the user interface were accessed with a trackball. The Philips VP415 was shown in the 1989 James Bond film: “License to Kill”.
- ^ a b Rhind, David; Openshaw, Stan (1986). "The BBC Domesday System: A Nationwide CIS FOR $4448" (PDF). Archived from the original (PDF) on 15 March 2016. Retrieved 13 April 2013.
{{cite journal}}: Cite journal requires|journal=(help) - ^ The BBC Master, introduced by Acorn Computers in 1986, was one of the first home computers to feature the new SCSI-1 parallel communications bus.